#include <stdio.h>
#include <stdlib.h>
#include<stdio.h>
#include<unistd.h>
#include<sys/types.h>

int main()
{
    char tree[80];
    if(fork() == 0)
    {
        pid_t pid_1 = getpid();
        printf("Proces pid_1 = %d\n", pid_1);
        sprintf(tree, "pstree -cp %d", pid_1);
        if(fork() == 0)
        {
            pid_t pid_2 = getpid();
            printf("Proces pid_2 = %d\n", pid_2);
            if(fork() == 0)
            {
                pid_t pid_3 = getpid();
                printf("Proces pid_3 = %d\n", pid_3);
                sleep(100);
                _exit(0);
            }
            if(fork() == 0)
            {
                pid_t pid_4 = getpid();
                printf("Proces pid_4 = %d\n", pid_4);
                sleep(100);
                _exit(0);
            }
            if(fork() == 0)
            {
                pid_t pid_5 = getpid();
                printf("Proces pid_5 = %d\n", pid_5);
                sleep(100);
                _exit(0);
            }
            sleep(100);
            _exit(0);
        }

        if(fork() == 0)
        {
            pid_t pid_6 = getpid();
            printf("Proces pid_6 = %d\n", pid_6);
            if(fork() == 0)
            {
                pid_t pid_6 = getpid();
                printf("Proces pid_6 = %d\n", pid_6);
                sleep(100);
                _exit(0);
            }
            if(fork() == 0)
            {
                pid_t pid_7 = getpid();
                printf("Proces pid_7 = %d\n", pid_7);
                sleep(100);
                _exit(0);
            }
            if(fork() == 0)
            {
                pid_t pid_8 = getpid();
                printf("Proces pid_8 = %d\n", pid_8);
                sleep(100);
                _exit(0);
            }
            sleep(100);
            _exit(0);
        }
        system(tree);
        sleep(100);
        _exit(0);
    }


    return 0;
}